Put the flour into a large bowl with 1 tsp salt. In a separate bowl, mix the yeast with the water and add it to the flour, stirring continuously until it comes together to form a ball of dough.
Tip out the dough onto a floured surface and knead for 10 minutes, or until smooth. Put the dough in a clean bowl and rub with 1 tsp of the oil. Cover with cling film and leave to rise for 2 hours or until doubled in size.
Preheat the oven to 200c, 400f, gas mark 6. Meanwhile, put the potatoes in a pan of salted water and bring to the boil. Cook for 10 minutes or until tender and drain.
Slice the potatoes into a bowl and toss with the onions and remaining oil.
Roll out the dough thinly to fit a large baking tray. Dust the tray with flour and top with the dough. Scatter over the cheeses, followed by the vegetables and rosemary. Season and bake for 15-20 minutes or until golden.
Homemade pizzas are always the best and you can add as much cheese as you want to this one.
Serves: 4
Preparation: 20 mins
Cooking: 20 mins
350g Albert Bartlett Cornish Kings Potatoes
500g (1lb 4oz) plain flour- plus extra for dusting
1 tsp fast acting dried yeast
375ml (13fl oz) warm water
2 tbsp olive oil
1 large red onion- finely sliced
100g (4oz) Gruyere cheese (grated)
100g (4oz) mozzarella (cut into 2cm (3/4") cubes)
100g (4oz) cheddar cheese (grated)
2-3 fresh rosemary sprigs (broken into small pieces)